[lacnog] Alternativas for Incoming Connections when using CGNAT

[Fernando Frediani]

Hello folks.

I wanted to share a topic with you and gather your views on the matter so
perhaps it can be useful to people specially for ISP operadors.

With the growing need o CGNAT (or equivalent methods) at many ISPs some
issues appear more frequentlly as for example users who require Incoming
Connections and Port Reditections for various reasons like access a camera
system as DVR/NVR for example, a Home/SMB Server or similar or even to be
able to Host Games' matches.

For DVRs there have been more recentlly some makers that developed a 'Cloud
System' whihc kind of resolves the issue by doing some type of NAT Punch
Hole with the help of an external 'coordinator' server and which becomes
something very handy avoiding the ISP having to attribute a public IPv4 for
that user.

But that is specific to that application and the maker develop implement
the technology and mantain the servers who coordinate this technique.

I wanted to find out more other applications who are able to work with this
technique to bypasss CGNAT issues lime this more easily going futher to
perhaps having something that can work or is adaptable to other situations
like a Home/SMB Server or a Gaming system.

This can help many ISPs to resolve many problems caused by the adaption of
the unavoidable CGNAT other than just the DVR scenarios.

Note: even with IPv6 fully implemented at the ISP that still may be many
cases where either the hosted equipment didn't get firmware upgrade to
suport IPv6 or the most common, the access device not having a IPv6
connection available.

Thanks
Best regards

Fernando Frediani
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